71 lines
2.0 KiB
TypeScript
71 lines
2.0 KiB
TypeScript
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import { ExcalidrawElement } from "../element/types";
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import {
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getElementAbsoluteX1,
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getElementAbsoluteX2,
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getElementAbsoluteY1,
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getElementAbsoluteY2
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} from "../element";
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export function setSelection(
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elements: ExcalidrawElement[],
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selection: ExcalidrawElement
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) {
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const selectionX1 = getElementAbsoluteX1(selection);
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const selectionX2 = getElementAbsoluteX2(selection);
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const selectionY1 = getElementAbsoluteY1(selection);
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const selectionY2 = getElementAbsoluteY2(selection);
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elements.forEach(element => {
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const elementX1 = getElementAbsoluteX1(element);
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const elementX2 = getElementAbsoluteX2(element);
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const elementY1 = getElementAbsoluteY1(element);
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const elementY2 = getElementAbsoluteY2(element);
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element.isSelected =
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element.type !== "selection" &&
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selectionX1 <= elementX1 &&
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selectionY1 <= elementY1 &&
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selectionX2 >= elementX2 &&
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selectionY2 >= elementY2;
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});
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}
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export function clearSelection(elements: ExcalidrawElement[]) {
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elements.forEach(element => {
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element.isSelected = false;
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});
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}
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export function deleteSelectedElements(elements: ExcalidrawElement[]) {
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for (let i = elements.length - 1; i >= 0; --i) {
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if (elements[i].isSelected) {
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elements.splice(i, 1);
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}
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}
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}
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export function getSelectedIndices(elements: ExcalidrawElement[]) {
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const selectedIndices: number[] = [];
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elements.forEach((element, index) => {
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if (element.isSelected) {
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selectedIndices.push(index);
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}
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});
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return selectedIndices;
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}
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export const someElementIsSelected = (elements: ExcalidrawElement[]) =>
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elements.some(element => element.isSelected);
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export function getSelectedAttribute<T>(
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elements: ExcalidrawElement[],
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getAttribute: (element: ExcalidrawElement) => T
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): T | null {
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const attributes = Array.from(
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new Set(
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elements
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.filter(element => element.isSelected)
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.map(element => getAttribute(element))
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)
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);
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return attributes.length === 1 ? attributes[0] : null;
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}
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